/*
 * Copyright (c) 2019 Spotify AB.
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.spotify.heroic.lifecycle

data class ManyLifeCycle(
    val lifeCycles: List<LifeCycle>
): LifeCycle {
    override fun toString(): String = "+$lifeCycles"

    override fun install() = lifeCycles.forEach { it.install() }

    companion object {
        @JvmStatic fun of(many: Iterable<LifeCycle>): LifeCycle {
            val flattened = many.filter { it != LifeCycle.EMPTY }.flatMap {
                when (it) {
                    is ManyLifeCycle -> it.lifeCycles
                    else -> listOf(it)
                }
            }
            return ManyLifeCycle(flattened)
        }
    }
}
